<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- 准备好一个容器 -->
    <div id="test"></div>

    <!-- 引入react核心库 -->
    <script src="../js/react.development.js"></script>
    <!-- 引入react-dom用于支持react操作dom -->
    <script src="../js/react-dom.development.js"></script>
    <!-- 引入babel，用于将jsx转为js -->
    <script src="../js/babel.min.js"></script>

    <script type="text/babel">
        // 1.创建组件
            class Weather extends React.Component{
                // constructor(props){
                //     super(props);
                //     // this.state = {
                //     //     isHot:true,
                //     //     wind:'微风'
                //     // };
                //     // this.changeWeather = this.changeWeather.bind(this);
                // }
            // 初始化状态
                state = {  isHot:true,  wind:'微风'};

                render(){
                   
                    return <h1 onClick={this.changeWeather}>今天天气很{this.state.isHot?'炎热':'凉爽'},{this.state.wind} </h1>
                }

            //    自定义方法————要用赋值语句+箭头函数
             changeWeather = ()=>{
                const isHot = this.state.isHot;
                this.setState({isHot:!isHot})
              }

 }
            
            ReactDOM.render(<Weather/>,document.getElementById('test'));

    
        </script>
</body>

</html>